Muratec MFX-2500 Field Engineering Manual page 368

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6.4.1.6.5 Paper Near Empty Detection
A paper-near-empty condition is detected through the detection of the height of the Paper Lifting Plate.
As the paper stack is consumed during a copy cycle, the Paper Lifting Plate of the cassette is gradually
raised by the tension of the Paper Lifting Springs. When the Paper Near Empty Sensor is then
unblocked, the machine determines that it is a paper-near-empty condition (the number of sheets of
2
paper (80 g/m ) still available for use: 50 ±30). The LED then starts blinking.
Since the amount of paper still available for use varies while a paper take-up sequence is in progress,
detection is made at a timing when the Paper Take-Up Roll is in the retracted position.
Paper near empty
sensor S5
Paper lifting plate
Actuator
LED
6-14
Paper Feed Unit